DAQ Assistant

[Al92651]

I have a simple transistor circuit, that I need to make 4 external dc voltage measurement, calculating beta. I was working through a tutorial where that used the DAQ assistant was used to make some external measurements. I have the evaluation version of Labview and can't find the DAQ assistant. Is it included with the evaluation. Or is there a better way to input 4 external dc signals to the program?

[Dennis_Knutson]

The DAQ Assistant is included with the DAQmx driver for an NI data acquisition board. The latest version is 8.8 which you can download but unless you have an NI DAQ board, it won't do you any good. Do you have a DAQ board? If so, what model?

[Al92651]

I a using the NI Elvis prototyping board to build the circuit, is there a general purpose input function to measure voltage?

[Now_With_Underscores]

If you're using the ELVIS, you can use the ELVIS software soft front panels to acquire your voltage value without needing to code anything.  Once you've installed the software, look in Start>Programs>National Instruments>NI ELVIS for the soft front panels.

[Al92651]

Thanks for the innformation, in this case I have to write a program in Labview. Also I have 8.6 but have to save the program to run on version 8.2 and I got a number of errors during the conversion concerning the math functions, divide and subtract. Is there an incompatiblity with these functions, is there a work around?

Thanks

[Now_With_Underscores]

The easiest way to obtain the voltage is to use the DAQ Assistant Express VI (Block Diagram: Measurement I/O>NI DAQmx>DAQ Assist). 

The warnings you obtain when you use the math functions are due to an internal change as to how we process output data and type when different data types are connected to the input terminals.  This usually isn't an issue unless there is an overflow (too large a number for the data type), which is why we throw a warning.